scholarly journals Effect of Substrate Salinity on Growth of Juvenile Plants Pyrus pyraster (L.) Burgsd

2020 ◽  
pp. 66-73
Author(s):  
Viera Paganová ◽  
Marek Hus ◽  
Helena Lichtnerová
Keyword(s):  
Pyrus Pyraster ◽  
Juvenile Plants

Isthmiella faullii. [Descriptions of Fungi and Bacteria].

1984 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Geographical Distribution ◽  
New Hampshire ◽  
Abies Balsamea ◽  
Eastern North America ◽  
Northern Ontario ◽  
Needle Blight ◽  
Juvenile Plants

Abstract A description is provided for Isthmiella faullii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Apparently confined to Abies balsamea. DISEASE: Causes a needle blight of Abies balsamea. According to Darker (1932), it 'is the commonest and most destructive of the Hypodermataceae on Abies balsamea in eastern North America'. It is particularly damaging to seedlings and juvenile plants. In northern Ontario, from where the disease was originally identified, infection occurs during the summer, but signs of the disease do not appear until the following spring, when needles become brown and conidiomata develop, conidia being discharged in July, and shortly after this ascomata begin to form, maturing in July of the following year. GEOGRAPHICAL DISTRIBUTION: Reported from Canada: Nova Scotia, Ontario, Quebec and USA: Michigan and New Hampshire. TRANSMISSION: Through air dispersal of ascospores, which directly infect the leaves (Darker, 1932).

scholarly journals Genetic stability of wild pear (Pyrus pyraster, Burgsd) after cryopreservation by encapsulation dehydration

2008 ◽  
Vol 18 (2) ◽  
pp. 136 ◽  
Author(s):  
E. CONDELLO ◽  
M.A. PALOMBI ◽  
M.G. TONELLI
Keyword(s):  
Genetic Stability ◽  
Rapd Analysis ◽  
Leaf Shape ◽  
Alginate Beads ◽  
Mother Plant ◽  
Multiplication Rate ◽  
Fresh Weight ◽  
Base Pairs ◽  
Fresh Weight Basis ◽  
Pyrus Pyraster

Shoot tips of Pyrus pyraster were successfully cryopreserved by encapsulation-dehydration. Na--alginate beads each containing one shoot tip, dehydrated for 2 days in 0.75M sucrose and desiccated to 20% moisture content (fresh weight basis), gave 60% recovery after exposure to liquid nitrogen. Regenerated shoots showed no differences in length and leaf shape compared to the mother plant. Multiplication rate and rooting ability of cryopreserved shoots were lower than those of untreated controls after one subculture, but were completely restored following the third subculture. Fifteen cryopreserved lines derived from single buds were used for genetic analyses by RAPDs and SSRs, in comparison with the mother plant. In RAPD analysis, of a total of 24 primers, only 15 showed reproducible and well resolved bands and were further used. These primers produced a total of 66 fragments ranging from about 500 to 2500 base pair size. SSR (microsatellite) marker amplification was performed using 19 primers which produced 57 reproducible fragments. Microsatellites fragments ranged from 60 to 600 base pairs. Both RAPDs and SSRs did not reveal any polymorphism between cryopreserved lines and the original genotype, suggesting that cryopreservation, using encapsulation-dehydration, does not affect genetic stability of wild pear.;

scholarly journals Physiological Performance of Pyrus pyraster L. (Burgsd.) and Sorbus torminalis (L.) Crantz Seedlings under Drought Treatment

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1496
Author(s):  
Viera Paganová ◽  
Marek Hus ◽  
Zuzana Jureková
Keyword(s):  
Gas Exchange ◽  
Water Potential ◽  
Water Scarcity ◽  
Prolonged Exposure ◽  
Leaf Gas Exchange ◽  
Total Biomass ◽  
Drought Treatment ◽  
Water Regimes ◽  
Sorbus Torminalis ◽  
Pyrus Pyraster

In this study, seedlings of Pyrus pyraster and Sorbus torminalis were grown for 60 days in the regulated environment of a growth chamber under different water regimes. The measured indicators were the growth and distribution of mass to organs, total biomass, root to shoot mass ratio (R:S), and gas exchange parameters (gs, E, An, and water use efficiency (WUE)). The amount of total biomass was negatively affected by drought. Differences between species were confirmed only for the dry matter of the leaves. P. pyraster maintained the ratio of the mass distribution between belowground and aboveground organs in both variants of the water regime. S. torminalis created more root length for a given dry-mass under drought treatment, but its R:S was lower compared to P. pyraster. The water potential of the leaves (Ψwl) was affected by substrate saturation and interspecific differences. P. pyraster had a demonstrably higher water potential and maintained this difference even after prolonged exposure to drought. After 30 days of different water regimes, Pyrus maintained higher values of gs, An, and E in control and drought treatments, but over a longer period of drought (after 50 days), the differences between species were equalized. The changes of the leaf gas exchange for Pyrus were accompanied by a significant increase in WUE, which was most pronounced on the 40th day of the experiment. A significant and strong relationship between WUE and gs was demonstrated. The results confirmed the different physiological performances of seedlings of tree species and the different mechanisms of their response to water scarcity during drought treatment. P. pyraster presented more acclimation traits, which allowed this taxon to exhibit better performance over a longer period of water scarcity.

Using β-ocimene to increase the artemisinin content in juvenile plants of Artemisia annua L.

2020 ◽  
Vol 42 (7) ◽  
pp. 1161-1167
Author(s):  
Mu Xiao ◽  
Rong Liu ◽  
Chenfeng Long ◽  
Ying Ruan ◽  
Chunlin Liu
Keyword(s):  
Artemisia Annua ◽  
Artemisia Annua L ◽  
Artemisinin Content ◽  
Juvenile Plants

Morphology of and Silicon Distribution within the Non-Glandular Trichomes of Soybean

1997 ◽  
Vol 3 (S2) ◽  
pp. 101-102
Author(s):  
R.N. Paul ◽  
C.D. Elmore ◽  
D. Gibson
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Glandular Trichomes ◽  
Energy Dispersive ◽  
Fixed Tissue ◽  
Trifoliate Leaf ◽  
X Ray ◽  
Transmission Electron ◽  
Leaf Surfaces ◽  
Semithin Sections ◽  
Juvenile Plants

Three near isolines of soybean [Glycine max (L.) Merr.], glabrous, normal, and dense, were examined by light, scanning electron, and transmission electron microscopy, as well as by energy dispersive x-ray spectroscopy. This was done in order to determine the morphology and possible functions, in addition to conveying insect resistance, of their non-glandular trichomes.The uppermost fully expanded trifoliate leaf from greenhouse grown juvenile plants was chosen for examination. Fixed tissue was examined by LM, TEM and SEM as previously described. Some tissue was prepared for energy dispersive spectrometry by fixing in glutaraldehyde but omitting osmium. The tissue was then dehydrated, critical point dried, and coated with carbon. Si x-ray maps were made on the adaxial and abaxial leaf surfaces of all three biotypes.LMs of Spurr embedded toluidine blue stained semithin sections of normal (Fig. 1) and glabrous (Fig. 2) trichomes appear similar in structure.

Juvenile plants of an epiphytic bromeliad exhibit rapid changes in carbohydrate content and antioxidant capacity to cope with water withholding

2020 ◽  
Vol 32 (2) ◽  
pp. 89-98 ◽  
Author(s):  
Fernanda O. Menezes ◽  
Victória Carvalho ◽  
Victoria A. Moreira ◽  
Athos P. Rigui ◽  
Marilia Gaspar ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Carbohydrate Content ◽  
Rapid Changes ◽  
Juvenile Plants

Silage yield and quality traits in elite maize hybrids and their relationship to elemental concentrations in juvenile plants

2015 ◽  
Vol 135 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Albrecht E. Melchinger ◽  
Friedrich H. Utz ◽  
Alexander Bay ◽  
Vilson Mirdita ◽  
Uwe Ludewig
Keyword(s):  
Quality Traits ◽  
Maize Hybrids ◽  
Elemental Concentrations ◽  
Yield And Quality ◽  
Juvenile Plants

scholarly journals Chloride Accumulation in Aboveground Biomass of Three Macrophytes (Phragmites Australis, Juncus Maritimus, and Typha Latifolia) Depending on Their Growth Stages and Salinity Exposure. Application for Cl- Removal and Phytodesalinization.

2021 ◽  
Author(s):  
Emmanuel Delattre ◽  
Isabelle TECHER ◽  
Benjamin Reneaud ◽  
Patrick Verdoux ◽  
Isabelle Laffont-Schwob ◽  
...  
Keyword(s):  
Phragmites Australis ◽  
Growth Stage ◽  
Anthropogenic Activities ◽  
Typha Latifolia ◽  
Common Reed ◽  
Shoot Biomass ◽  
Growth Stages ◽  
Limited Information ◽  
Chloride Removal ◽  
Juvenile Plants

Abstract Anthropogenic activities can be the source of saline solid wastes that need to be treated to reduce their salt load to meet the purposes of reuse, valorization or storage. In this context, chloride remediation can be achieved using high-salt accumulating plants. However, there is very limited information on the comparative potential of different species in the same environment, and only scarce data concerning their efficiency as a function of growth stage. In order to rationalize these selection criteria, three macrophytes i.e. common reed (Phragmites australis), sea rush (Juncus maritimus) and cattail (Typha latifolia) were cultivated at two growth stages (6-months old and 1-year old) for 65 days in Cl- spiked substrates (from 0 up to 24 ‰ NaCl). The plants’ survival and potential capacity for removal of Cl- from substrates and accumulation in shoots were investigated. For the three studied species, mature and juvenile plants display a high tolerance to salinity. However, mature specimens with higher shoot biomass and Cl- contents are capable of greater chloride removal than juvenile plants. The sole exception is P. australis which displays just the same phytoremediation potential for both mature and juvenile specimens. Moreover, P. australis has the lowest potential when compared with other species, being 1.5 and 3 times lower than for J. maritimus and T. latifolia. When considering the plant growth and the shoot biomass production, chloride removal rates from the substrate point that mature J. maritimus should preferentially be used to design an operational chloride remediation system. The results highlight the relevance of considering the growth stage of plants used for Cl- removal.

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